Emissions of SO2, NO and N2O in a circulating fluidized bed combustor during co-firing coal and biomass

CORC > 过程工程研究所 > 中国科学院过程工程研究所 > 研究所（批量导入）

	Emissions of SO2, NO and N2O in a circulating fluidized bed combustor during co-firing coal and biomass
	Xie Jian-jun ; Yang Xue-min ; Zhang Lei ; Ding Tong-li ; Song Wen-li ; Lin Wei-gang
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
	2007
卷号	19 期号:1 页码:109-116
关键词	circulating fluidized bed (CFB) combustion SO2 NO N2O co-firing biomass
ISSN号	1001-0742
其他题名	J. Environ. Sci.
中文摘要	This paper presents the experimental investigations of the emissions of SO2, NO and N2O in a bench scale circulating fluidized bed combustor for coal combustion and co-firing coal and biomass. The thermal capacity of the combustor is 30 kW. The setup is electrically heated during startup. The influence of the excess air, the degree of the air staging, the biomass share and the feeding position of the fuels on the emissions of SO2, NO and N2O were studied. The results showed that an increase in the biomass shares resulted in an increase of the CO concentration in the flue gas, probably due to the high volatile content of the biomass. In co-firing, the emission of SO2 increased with increasing biomass share slightly, however, non-linear increase relationship between SO2 emission and fuel sulfur content was observed. Air staging significantly decreased the NO emission without raising the SO2 level. Although the change of the fuel feeding position from riser to downer resulted in a decrease in the NO emission level, no obvious change was observed for the SO2 level. Taking the coal feeding position R as a reference, the relative NO emission could significantly decrease during co-firing coal and biomass when feeding fuel at position D and keeping the first stage stoichiometry greater than 0.95. The possible mechanisms of the sulfur and nitrogen chemistry at these conditions were discussed and the ways of simultaneous reduction of SO2, NO and N2O were proposed.
英文摘要	This paper presents the experimental investigations of the emissions of SO2, NO and N2O in a bench scale circulating fluidized bed combustor for coal combustion and co-firing coal and biomass. The thermal capacity of the combustor is 30 kW. The setup is electrically heated during startup. The influence of the excess air, the degree of the air staging, the biomass share and the feeding position of the fuels on the emissions of SO2, NO and N2O were studied. The results showed that an increase in the biomass shares resulted in an increase of the CO concentration in the flue gas, probably due to the high volatile content of the biomass. In co-firing, the emission of SO2 increased with increasing biomass share slightly, however, non-linear increase relationship between SO2 emission and fuel sulfur content was observed. Air staging significantly decreased the NO emission without raising the SO2 level. Although the change of the fuel feeding position from riser to downer resulted in a decrease in the NO emission level, no obvious change was observed for the SO2 level. Taking the coal feeding position R as a reference, the relative NO emission could significantly decrease during co-firing coal and biomass when feeding fuel at position D and keeping the first stage stoichiometry greater than 0.95. The possible mechanisms of the sulfur and nitrogen chemistry at these conditions were discussed and the ways of simultaneous reduction of SO2, NO and N2O were proposed.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	RICE HUSK ; FUEL NITROGEN ; REDUCTION ; COCOMBUSTION ; PYROLYSIS ; CONVERSION ; WOOD ; GASIFICATION ; ADDITIVES ; FURNACES
收录类别	SCI
原文出处	://WOS:000243493500018
语种	英语
WOS记录号	WOS:000243493500018
公开日期	2013-10-15
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/3479]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Xie Jian-jun,Yang Xue-min,Zhang Lei,et al. Emissions of SO2, NO and N2O in a circulating fluidized bed combustor during co-firing coal and biomass[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2007,19(1):109-116.
APA	Xie Jian-jun,Yang Xue-min,Zhang Lei,Ding Tong-li,Song Wen-li,&Lin Wei-gang.(2007).Emissions of SO2, NO and N2O in a circulating fluidized bed combustor during co-firing coal and biomass.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,19(1),109-116.
MLA	Xie Jian-jun,et al."Emissions of SO2, NO and N2O in a circulating fluidized bed combustor during co-firing coal and biomass".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 19.1(2007):109-116.